I'm working on a website locally using Lay Theme 2.5.6 and running into a weird problem:

In Firefox and Edge there's a white area below my footer (not in Chrome and Opera).
The footer is set up as a sticky footer, the footer page has 0% bottom frame.

From what I've seen in the inspector it seems that the "div#grid.grid" is higher than the content within (see screenshot attached). I also found that this extra area only appears after I put content (text in this case) on the footer page. When I leave the footer page empty, the additional space dissapears.